There won't be that much in naval assets to start with, mainly down to BF2 being a pretty crappy engine to do modern(ish) naval warfare on and got a few issues which would stop us from having controllable ships/subs outside of the map area (since I've had to revert to an 8km map with open borders).

HMS Invincible dose feature, but only as a modified USS Essex although it dose pass off okish, other than thous damn side lifts! A Small Falklands Teaser - Project Reality Forums
The Atlantic Conveyor will also feature somewhat
The biggest problem with having any naval vessels is simply making them, since they are a massive piece of work to make in any detail and then don't offer that much to the gameplay unfortunately, other than targets